On Saturday, November 8 and Sunday, November 9, all Toys R Us stores in the United States and Puerto Rico will be giving away Level 50 Dragonite from 12:00-4:00 PM. No information has been given on exact moves or if it will be holding anything, but apparently, the only thing that is really unique about it is the fact that Dragonair doesn't evolve into Dragonite until Level 55, so it typically isn't possible to legally have a Level 50 Dragonite. More information is supposed to be given closer to the promo date.

Source: www.pokemon.com